Water structure in gellan gum-water system.
Water structure in gellan gum-water system.
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DOI：
10.1016/s0144-8617(96)00083-5
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发表时间：
1996-06
影响因子：
11.2
通讯作者：
S. Mashimo;N. Shinyashiki;Y. Matsumura
中科院分区：
文献类型：
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作者：
S. Mashimo;N. Shinyashiki;Y. Matsumura
结冷胶在50 °C的温度下显示凝胶-溶胶转变。在凝胶和溶液中均观察到两个明显的弛豫峰。在约10 GHz处观察到的高频峰可以很容易地归因于自由水。令人惊讶的结果是，甚至在凝胶相中也存在游离水，并且所包含的大部分水是游离水。10 MHz附近的低频峰可能是由于结合水的取向。松弛强度在凝胶-溶液转变点处显示出剧烈的变化。在凝胶相中比在溶液中大得多。在有关的频率范围内没有发现其他弛豫过程。
Gellan gum shows a gel-sol transition at a temperature of 50 °C. Two relaxation peaks were definitely observed both in gel and in solution. The high frequency peak observed at about 10 GHz could be easily attributed to free water. It is a surprising result that free water exists even in the gel phase and most of water included is the free water. The low frequency peak around 10MHz would be due to orientation of bound water. Relaxation strength shows a drastic change at the gel-solution transition point. It is far greater in gel phase than in solution. No other relaxation process could be found in the frequency range concerned.